Washing of yarn



Dec. 1, 1936.

J. L. BITTER WASHING OF YARN Filed Feb. 14, 1935 2 Sheets-Sheet 1 OOOOQOOOG 00000000 J. L. BITTER Dec. l, i936.

WASHING OF YARN Filed Feb. 14, 1955 2 Sheets-Sheet 2 www@ JO/ L. /TTER Patented Dec. 1, 1936 UNITED STATES WASHING OF YARN Jack L. Bitter, Elizabethton,

North American Rayon Corporation,

Term., assigner to New York,

N. Y., a corporation of Delaware Application February 14, 1935, Serial No. 6,503

4 Claims.

My present invention concerns a new and novel method for use in the washing of yarn packages.

One object of the present invention is to provide a method of slowly and evenly washing yarn so that the dyeing qualities of the resultant yarn, and of any fabric made therefrom, are much more uniform than heretofore.

Another object of the present invention is to set forth a simple manner or means whereby such a uniform and gradual washing may be accomplished.

Other objects will in part become obvious and will in part be pointed out in the following specif'lcation and claims, when taken in conjunction with the accompanying drawings, in which:

Fig. l is a longitudinal cross-sectional view of an arrangement of apparatus for carrying out my novel method with spooled yarn bodies; and

Fig. 2 is a view similar in nature to Fig. 1 of the means for carrying out my method with spinning cakes.

In the ordinary method of washing out yarn, collected on spools, the yarn is placed in a container and the water forced through the yarn body either by pressure or vacuum. By this means a very rapid washing of the yarn is accomplished, which, however, has a deleterious effect on the yarn, the result being that the yarn, and fabrics made therefrom, possess non-uniform dyeing qualities.

In my new process, however, I carry out this washing in such a Way that a quite uniform and gradual separation of the chemicals is accomplished without in any manner disturbing the yarn body or having any deleterious effects on the filaments. At the same time the yarn is washed entirely free of any chemicals therein.

In the drawings in which like numerals of reference indicate like parts, and referring specifically to Fig. 1 of the drawings, I indicates the usual type of perforated spool upon which a yarn body 4 is wound. Projecting into each end of the spool I are tapered plugs 2-2 centered and mounted on a solution supply 3 for carrying the washing fluids.

Surrounding the yarn body 4 is provided a fluidtight wrapping 5.

The yarn body 4 which is saturated with chemicals from the spin bath is washed by passing the washing liquids through the supply pipe 3, which wash liquids pass through the perforations in the said supply pipe and gradually and uniformly wash out the chemicals contained in the yarn body from the inside through the holes or perforations 6 in the spools. Due to the presence of the fluid-tight covering 5 surrounding the outer surface of the yarn body 4, all washing or removal of the chemicals therefrom is accomplished from the inside only by diffusion.

The passing of the Water through the pipe 3, and consequently through the yarn support, removes all of the chemicals therefrom and thus imparts a gradual and uniform washing which greatly improves the dyeing qualities of the yarn.

In Fig. 2 of the drawings is illustrated a modified form of apparatus adapted for employing my novel method with cakes of yarn produced by the pot spinning or centrifugal process.

A supply pipe l is perfo-rated at spaced portions of its length as indicated at 8. The spinning cakes 9 have placed therein the usual resilient inserts Aor supports I0 which are perforated as indicated at II.

An impermeable cover and spacing means composed of two parts I2 and I3 are disposed on either side of the cakes 9 and surround the supv ply pipe I.

This cover member has the two sections I2 and I3 telescopically engaging each other as indicated at I4. Depressed and tapered portions I5 and I6 bear against the insert Ill and thereby center it and the cake 9 around the supply pipe l.

Water or other washing solutions are then passed through the said pipe 1 and the same results accomplished as in apparatus for Washing spooled yarn bodies, described above.

Having now set forth my invention as required by the patent statutes, what I desire to claim is:

l. In the diffusion washing of yarn bodies of artificial origin, the step of applying the washingliquid to the inner side only of the yarn body so that the Washing is accomplished fro-m the inner side only.

2. In the diffusion washing o-f artificial yarn bodies, the step of covering one side of the body with a fluid-tight cover, and applying the purifying medium to the other side only, of the body.

3. In the diffusion Washing of yarn bodies collected on spools, the steps of covering the entire outer surface of the spools with a fluid-tight covering, and applying the washing liquid only to the inner face of the spool upon which the yarn is wound.

4. In a device for washing yarn of artificial origin, in combination, a foraminated support for the yarn body, a fluid-tight cover for the outer face of the body, and means for introducing Washing liquid to the inner face of the yarn body, through the said foraminous support so that the washing is accomplished by diffusion from one side of the said body, only.

` JACK L. BITTER. 

